The 1931 Workers' Olympiad was the third edition of International Workers' Olympiads. The games were held from July 19 to July 26 at Vienna, Austria. Some 100,000 athletes participated the Olympiad, number includes the ones taking part at the mass gymnastics event. Games had about 250,000 spectators and they were larger than 1932 Los Angeles Olympics, both in number of participants and spectators. The opening ceremony Das Große Festspiel was written by Austrian writer Robert Lucas, music was composed by Argentinian composer together with .